The E1 and H strings locking pins are very low quality. I contacted the seller to replace it, but only I was offered to pay the postage and sent 2 locking pin. I didn't ask for two new keys, just would like to wanted to get two new locking pin. The aliexpress judges close my dispute, without they would have been allowed to upload other evidence. And that was a Big mistake. For lockable keys, it is very important that the lock works. Without it, the whole thing is worth nothing. The 1 starts to the envious seller, who asks for money to send two little pins, and I, ve paid for it once. And 1 star to the Aliexpress judges, that the case was not thoroughly investigated.
Fantastic tuners which I placed in my Epiphone Les Paul. The work great, are locking and look fantastic.